Location Indicator Panel

At bottom left, the Location Indicator panel shows current row and column numbers. Click there and a window appears, listing lines that you bookmarked or jumped to or from. The most recently visited line appears at the top. You can click on any of these lines to jump there. Or, you can specify a line number to jump to.

If you delete group of lines from a file, the line numbers in the Location Indicator panel may not be up-to-date. Probably, if you click them, you would end up near [but not quite on] the desired line.